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This page is part of the effort to define a link-preview microformat or addition to an existing microformat. Per the The microformats process:


Previous efforts at link-preview formats:


Proprietary efforts at link-preview formats (proposed, maintained, and supported by only one vendor)

Twitter Cards

See (and expand inline here)


There have been a couple of standards created explicitly for information for link previews.


  • oEmbed - since 2009. However it requires an extra endpoint (URL, different language(s) etc.)

Open Graph Protocol

Though proposed and maintained exclusively by Facebook, their Open Graph Protocol is licensed with a OWFa license which is quite open (allows derivative works etc.)

OGP is far more well established since it works in HTML, and Facebook immediately shows results using it.

See (and expand inline here)

See Also